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//===--- DeclGroup.cpp - Classes for representing groups of Decls -*- C++ -*-==//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the DeclGroup and DeclGroupRef classes.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/DeclGroup.h"
#include "clang/AST/Decl.h"
#include "clang/AST/ASTContext.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Bitcode/Serialize.h"
#include "llvm/Bitcode/Deserialize.h"
using namespace clang;
DeclGroup* DeclGroup::Create(ASTContext &C, Decl **Decls, unsigned NumDecls) {
assert(NumDecls > 1 && "Invalid DeclGroup");
unsigned Size = sizeof(DeclGroup) + sizeof(Decl*) * NumDecls;
void* Mem = C.Allocate(Size, llvm::AlignOf<DeclGroup>::Alignment);
new (Mem) DeclGroup(NumDecls, Decls);
return static_cast<DeclGroup*>(Mem);
}
/// Emit - Serialize a DeclGroup to Bitcode.
void DeclGroup::Emit(llvm::Serializer& S) const {
S.EmitInt(NumDecls);
S.BatchEmitOwnedPtrs(NumDecls, &(*this)[0]);
}
/// Read - Deserialize a DeclGroup from Bitcode.
DeclGroup* DeclGroup::Read(llvm::Deserializer& D, ASTContext& C) {
unsigned NumDecls = (unsigned) D.ReadInt();
unsigned Size = sizeof(DeclGroup) + sizeof(Decl*) * NumDecls;
unsigned alignment = llvm::AlignOf<DeclGroup>::Alignment;
DeclGroup* DG = (DeclGroup*) C.Allocate(Size, alignment);
new (DG) DeclGroup();
DG->NumDecls = NumDecls;
D.BatchReadOwnedPtrs(NumDecls, &(*DG)[0], C);
return DG;
}
DeclGroup::DeclGroup(unsigned numdecls, Decl** decls) : NumDecls(numdecls) {
assert(numdecls > 0);
assert(decls);
memcpy(this+1, decls, numdecls * sizeof(*decls));
}
void DeclGroup::Destroy(ASTContext& C) {
this->~DeclGroup();
C.Deallocate((void*) this);
}
void DeclGroupRef::Emit(llvm::Serializer& S) const {
if (isSingleDecl()) {
S.EmitBool(false);
S.EmitPtr(D);
} else {
S.EmitBool(true);
S.EmitPtr(&getDeclGroup());
}
}
DeclGroupRef DeclGroupRef::ReadVal(llvm::Deserializer& D) {
if (D.ReadBool())
return DeclGroupRef(D.ReadPtr<Decl>());
return DeclGroupRef(D.ReadPtr<DeclGroup>());
}
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